Both the Addon Manager & Couatl menus visable. Both Chicago & JFK are showing as active and not in trial mode.
That excludes a LOT of possible issue. You can safely exclude antivirus, firewall, problems with XML files, problems with Windows trust and anything like that. Fact you are seeing both menus means all our software is running correctly.
I assume you are using the current version of the Addon Manager. If not sure, try to install its Stand-Alone installer.
Check, after you are getting the problem, if you have the following file:
%APPDATA%\Virtuali\Couatl.err
Another thing to try, is to disable every module ( you basically have just AFX and several PMDG modules ) in the DLL.XML file, except the Addon Manager, and see if it makes any difference. Don't remove the section: it's enough to set the <Disabled> command to True
I'm also running on a fresh install of vista. No virus or firewall software installed. vista's baby sitting features are disabled (UAC, Defender, etc....)
"Fresh" means a stock, just installed Vista ? Because, you should at least install all the various Vista service packs and hotfixes.